Crackers are so named because some species can make a "cracking" sound with their wings. I have heard this sound when a Guatemalan Cracker is chasing other butterflies and also
when it is courting.

Click on one of the links below to download a video clip of a pair interacting. In the video, a male (it appears) is trying to
get the attention of an aloof female. The clip allows you to hear a Guatemalan Cracker "cracking".(Choose your preferred format).avi format (1.7 MB).flv format (2.3 MB).wmv format (2.3 MB)